This dataset was added because it generates an error in function 'chol2inv' when trying to invert the variance-covariance matrix 'V' of the mixed model 'value~ID+(Site)'. This dataset and the associated mixed model are part of the unit-test collection of the package.
A data frame with 158 observations on the following 3 variables.
The response variable.
Variable with 6 levels corresponding to samples.
Variable with 3 levels corresponding to sites/devices.